Like I said, my FIL was a good man.
We thought things would be different this year because the basic waste of a human life brother in law was finally dumped by the SIL (woud never listen to her family, but had therapist from her church finally tell her after she got to know the guy in counseling).
I just told my wife from now own, the set time to eat is the set time to eat, no if's ands or butts.
We actually made the time later due to a newphews work schedule (not the one who showed up 60 minutes late, the one who showed up only like 20 minutes late).
It really has been this way for 20 years and after I saw my MIL kind of get depressed about it, I'm kind of no longer going to tolerate. That said, she loves her other daughters and grand children, so going on the warpath won't accomplish anything.